Pr3+-doped silica glasses were prepared using acid hydrolyzed tetraethyl orthosilicate (TEOS). Thermal analysis and linear shrinkage of the pure and doped gels indicate that the Pr3+ ion modifies the structure of the gel. The absorption peak positions of Pr3+ ions in silica change with Al codoping. Fluorescence of Pr-doped gels shows some interesting behavior and changed considerably with the addition of Al3+.